Buggy code:
protected transient int [ ] [ ] fNodeExtra ; protected transient int fIdCount ; protected transient String [ ] fIdName ; protected transient int [ ] fIdElement ; protected boolean fNamespacesEnabled = false ; private final transient StringBuffer fBufferStr = new StringBuffer ( ) ; private final transient Vector fStrChunks = new Vector ( ) ; public DeferredDocumentImpl ( ) { } public DeferredDocumentImpl ( boolean namespacesEnabled ) { } public DeferredDocumentImpl ( boolean namespaces , boolean grammarAccess ) { } boolean getNamespacesEnabled ( ) { } void setNamespacesEnabled ( boolean enable ) { } public int createDeferredDocument ( ) { } public int createDeferredDocumentType ( String rootElementName , String publicId , String systemId ) { } public void setInternalSubset ( int doctypeIndex , String subset ) { } public int createDeferredNotation ( String notationName , String publicId , String systemId , String baseURI ) { } public int createDeferredEntity ( String entityName , String publicId , String systemId , String notationName , String baseURI ) { } public String getDeferredEntityBaseURI ( int entityIndex ) { } public void setEntityInfo ( int currentEntityDecl , String version , String encoding ) { } public void setActualEncoding ( int currentEntityDecl , String value ) { } public int createDeferredEntityReference ( String name , String baseURI ) { } public int createDeferredElement ( String elementURI , String elementName , Object type ) { } public int createDeferredElement ( String elementName ) { } public int createDeferredElement ( String elementURI , String elementName ) { } public int setDeferredAttribute ( int elementNodeIndex , String attrName , String attrURI , String attrValue , boolean specified , boolean id , Object type ) { } public int setDeferredAttribute ( int elementNodeIndex , String attrName , String attrURI , String attrValue , boolean specified ) { } public int createDeferredAttribute ( String attrName , String attrValue , boolean specified ) { } public int createDeferredAttribute ( String attrName , String attrURI , String attrValue , boolean specified ) { } public int createDeferredElementDefinition ( String elementName ) { } public int createDeferredTextNode ( String data , boolean ignorableWhitespace ) { } public int createDeferredCDATASection ( String data ) { } public int createDeferredProcessingInstruction ( String target , String data ) { } public int setDeferredPIBaseURI ( int nodeIndex , String baseURI ) { } public int createDeferredComment ( String data ) { } public int cloneNode ( int nodeIndex , boolean deep ) { } public void appendChild ( int parentIndex , int childIndex ) { } public int setAttributeNode ( int elemIndex , int attrIndex ) { } public void setIdAttributeNode ( int elemIndex , int attrIndex ) { } public void setIdAttribute ( int attrIndex ) { } public int insertBefore ( int parentIndex , int newChildIndex , int refChildIndex ) { } public void setAsLastChild ( int parentIndex , int childIndex ) { } public int getParentNode ( int nodeIndex ) { } public int getParentNode ( int nodeIndex , boolean free ) { } public int getLastChild ( int nodeIndex ) { } public int getLastChild ( int nodeIndex , boolean free ) { } public int getPrevSibling ( int nodeIndex ) { } public int getPrevSibling ( int nodeIndex , boolean free ) { } public int getRealPrevSibling ( int nodeIndex ) { } public int getRealPrevSibling ( int nodeIndex , boolean free ) { } public int lookupElementDefinition ( String elementName ) { } public DeferredNode getNodeObject ( int nodeIndex ) { } public String getNodeName ( int nodeIndex ) { } public String getNodeName ( int nodeIndex , boolean free ) { } public String getNodeValueString ( int nodeIndex ) { } public String getNodeValueString ( int nodeIndex , boolean free ) { } public String getNodeValue ( int nodeIndex ) { } public Object getTypeInfo ( int nodeIndex ) { if ( nodeIndex == ( - 1 ) ) { return null ; } int chunk = nodeIndex > > ( DeferredDocumentImpl . CHUNK_SHIFT ) ; int index = nodeIndex & ( DeferredDocumentImpl . CHUNK_MASK ) ; <START_BUG> Object value = fNodeValue [ chunk ] [ index ] ; <END_BUG> if ( value != null ) { fNodeValue [ chunk ] [ index ] = null ; DeferredDocumentImpl . RefCount c = ( ( DeferredDocumentImpl . RefCount ) ( fNodeValue [ chunk ] [ DeferredDocumentImpl . CHUNK_SIZE ] ) ) ; ( c . fCount ) -- ; if ( ( c . fCount ) == 0 ) { fNodeValue [ chunk ] = null ; } } return value ; } public String getNodeValue ( int nodeIndex , boolean free ) { } public int getNodeExtra ( int nodeIndex ) { } public int getNodeExtra ( int nodeIndex , boolean free ) { } public short getNodeType ( int nodeIndex ) { } public short getNodeType ( int nodeIndex , boolean free ) { } public String getAttribute ( int elemIndex , String name ) { } public String getNodeURI ( int nodeIndex ) { } public String getNodeURI ( int nodeIndex , boolean free ) { } public void putIdentifier ( String name , int elementNodeIndex ) { } public void print ( ) { } public int getNodeIndex ( ) { } protected void synchronizeData ( ) { } protected void synchronizeChildren ( ) { } protected final void synchronizeChildren ( AttrImpl a , int nodeIndex ) { } protected final void synchronizeChildren ( ParentNode p , int nodeIndex ) { } protected void ensureCapacity ( int chunk ) { } protected int createNode ( short nodeType ) { } protected static int binarySearch ( final int [ ] values , int start , int end , int target ) { } private final void createChunk ( int [ ] [ ] data , int chunk ) { } class RefCount { int fCount ; } private final void createChunk ( Object [ ] [ ] data , int chunk ) { }

Fix:
Object value = ( ( fNodeValue [ chunk ] ) != null ) ? fNodeValue [ chunk ] [ index ] : null ;